I had an oil analysis performed after my last oil service. The oil was changed after 2,500 miles (4 months), so it wasn't very old. I had been doing a lot of short journeys over the last few months, which hopefully won't be the case for the next 6 months.

My car does an active regen approximately every 100 miles, and the iCarsoft LR 3 was telling me the Oil Dilution factor was 7, so I was interested to see what analysis would turn up.

It looks like the Fuel Dilution was 1.5% so that looks fine. What was more interesting they called out the Soot% (0. as approaching a caution level. Is 1% really considered a caution level?

I'll include the analysis for anyone interested. I went with Miller's this time, but I may try a different one next time.

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When Millers tested the oil from my 2012 4.4TDV8 they measured oil dilution at 0.5% and soot level at 0.9% which as in your case they suggested was "...approaching a 'caution' level."

It would be interesting to know what results other people have had either from Millers or other test providers. 2012 TDV8 Westminster in the New Forest

Also: Land Rover Series 3 SWB, Mercedes 280SL, Classic Mini race replica, VW Golf SV
Previously: Audi A8, RR TDV8 Vogue, Audi Allroad, VW Golf GTI Edition 30, Audi A4 Avant, A8, A4 Sport, A6, VW Golf Mk5, Bora, Golf GTI Mk3, Jetta Mk3, Passat, Jetta Mk1, Golf Mk1

Interestingly, you got a very similar reading. How many miles had that oil done?

Hopefully, my next oil change won't be until 5k miles; however, I never know with this car.

I do similar miles in my TDV6 between oil changes, but MyOilDoctor give the values as “UFM” not % soot. Last 2 samples were 22 then 14, where I understand a level 60 is the warning trigger.
Fuel dilution is always ca. 1% after 2500-3000m of mostly short trips. V6 Vogue - “Less is More” - less to go wrong!

About 3,500 miles, so like yours quite low.

Density was almost identical and viscosity at 100 degrees slightly higher at 9.77.

My ferrous metal reading was 92 which they deemed 'satisfactory'. 2012 TDV8 Westminster in the New Forest

Also: Land Rover Series 3 SWB, Mercedes 280SL, Classic Mini race replica, VW Golf SV
Previously: Audi A8, RR TDV8 Vogue, Audi Allroad, VW Golf GTI Edition 30, Audi A4 Avant, A8, A4 Sport, A6, VW Golf Mk5, Bora, Golf GTI Mk3, Jetta Mk3, Passat, Jetta Mk1, Golf Mk1

It looks like your UFM readings are good. I don’t know if the values differ depending on who does the analysis though.

Click image to enlarge

It looks like you need to know what the engine's soot % limit is to be able to convert UFM to a percentage?

Shaun_ wrote:

It would be interesting to know what results other people have had either from Millers or other test providers.

I did wonder about the molybdenum as it is an additive in oils but could also be caused by some issues. It seems low enough so I will keep an eye on it when i next get an oil analysis done.